Phase Noise Suppression and Frequency Stabilization Technology Based on Single‐Fiber‐Loop Optoelectronic Oscillator

This paper presents a phase noise suppression and frequency stabilization technology for a single‐fiber‐loop optoelectronic oscillator (OEO). By incorporating low‐noise and high‐stability laser source control, bias point stabilization for the electro‐optic modulator, and a phase‐locked loop‐based frequency stabilization module, the proposed system achieves high performance without relying on multiloop or complex filtering architectures. An OEO prototype is developed and experimentally validated, delivering a 10 GHz radio frequency signal with phase noise levels of −140.70 dBc/Hz at 10 kHz offset, −120.68 dBc/Hz at 1 kHz, and −91.06 dBc/Hz at 100 Hz and a frequency stability of 1.2 × 10 −10 at 1 s. The results demonstrate that the integration of active control mechanisms effectively suppresses phase noise and enhances long‐term stability, facilitating the practical application of OEOs in high‐performance microwave systems.